17-oxygenatedestra-2, 5(10)-dienes and intermediates



United States Patent The present in 198 :Ielatesgto, stelfoidslin,v which the A ring has a diene structlllfec nd-mOIeparticularly-to 17- oxygenatedestrai it'llll-dienes and; to; intermediates for preparing same. The 17-oxygenatedestra-2,5(10)-dienes of this inveution are'irepresented bythestructuralformula wherein Z is selected from the group consisting of carbonyl, hydromethylene and (lower alkanoyl) oxymethylene radicals. The radicals encompassed by the term lower alkanoyl are, for example, formyl, acetyl, propionyl, butyryl, valeryl, caproyl, enanthyl, caprylyl and the branched-chain isomers thereof; said groups being the acyl radicals of alkanoic acids containing less than 9 carbon atoms.

A suitable starting material for the manufacture of the compounds of this invention is estr-(10)-en-3,17- dione. By reduction of this substance, for example with sodium borohydride, estr-5(l0)-en-3fl-ol-17-one is obtained. Treating the latter compound with p-toluenesulfonyl chloride results in BB-(p-tolylsulfonyloxy)-est1'- 5(10)-en-17-one. The latter ester is converted to estra- 2,5(10)-diene-17-one, for example by treatment with activated aluminum oxide. Reduction of the latter ketone, for example with lithium and liquid ammonia, affords estra-2,5 10) -dien-17-ol.

The 17-(lower alkanoyloxy) estra-2,5(10-)-dienes of this invention can be prepared by treating estra-2,5 (10)- dien-17-ol in pyridine with an alkanoic acid anhydride. propionic anhydride and pyridine to yield 17-propionoxyestra-2,5 10 -diene.

The 17-oxygenatedestra-2,5(10)-dienes of this invention are useful as a result of their valuable pharmacological properties. They have, for example, the capacity to decrease the serum concentration of cholesterol and the corresponding cholesterol: phospholipid ratio without at the same time producing the potent side effects characteristic of known estrogens adapted to regulation of cholesterol metabolism.

Estr-5(10)-en-3/3-ol-17-one and Bfi-(p-tolylsulfonyloxy)estr-5(10)-en-l7-one, also compounds of this invention, are useful as intermediates in the manufacture of the instant 17-oxygenatedestra-2,5(10)-dimes, as has been shown supra.

The invention will appear more fully firom the examples which follow. These examples are set forth by way of illustration only and it will be understood that the invention is not to be construed as limited in spirit or in scope by the details contained therein as many modifications in materials and methods will be apparent Patented July 5, 1960,.

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from this disclosure 'tothose skilled in the art. In these examples;;.temperatures are given' in'- degrees centigrade (C.).. Quantities'ofi materials are, expressedin: parts by; weight. except: where: otherwise noted;

EXAMPLE 1 Esta-'5 (J10) -en'-3B.-iol 17-one To a solution of 1'65fparts'of estr-5:('10)-ene-3;17"-dione in 32 00l"pant's oftmethanoliistadded, at 1045", a solu tion o'6'.2 parts. of sodium borohydride in'150 parts of water; andf. the mixture. is stirred for45" minutes. The reaction mixture is treatedwith parts of' acetic acid and the resultant solution-poured; into 8,000 parts of water. Theresultant;precipitate'is, collected by filtration, washed with water, dried, and dissolved'in benzene. Ghrornatography of the benzene-solution on 1700:parts of silica 'gel followed by' elution with= a 10% ethyl acetate %-benzene solution and recrystallizafiomfrom'acetonepetroleum ether affords estr SQ1'O)-en-3B-ol-17-one,M;P: 192 -194; tuli -P270; 'lts'infrared absorption spec trum--possesses maxima-at -2;76 and 5;77 microns;

.ifi-(p' toly'lsulfbnyloxy) ear-501m elt-W ene To a solution of 16.8 parts of estr-5( 10)-en-3 3-ol-17- one in 200 parts of pyridine is added, at 5, 18 parts of p-toluenesulfonyl chloride. The resultant solution is allowed to stand at room temperature for 18 hours, then treated with aqueous sodium bicarbonate. The mixture is extracted with benzene and the benzene solution washed successively with dilute hydrochloric acid, water, aqueous sodium bicarbonate, and water; dried over anhydrous magesium sulfate; and evaporated to dryness in vacuo. Recrystallization of the residue from methanol yields 3 B- (p-tolylsulfonyloxy) estr-5( 10) -en-17-one, M.P. -137"; [a] =|-182. It possesses maxima in the infrared at 5.76 and 6.28 microns.

EXAMPLE 3 Estra-2,5 (10) -a'ien-17-0ne A solution of 21.2 parts of 3,8-(ptolylsulfonyloxy)estr- 5(10)-en-17-one in 880 parts of benzene is passed over a column of 200 parts of activated alkaline aluminum oxide. The aluminum oxide has been activated according to the procedure described by Brockmann and Schodder (B. 74, 73 (1941)). Elution of the column with 880 parts of benzene, removal of the solvent, and recrystallization of the residue from methanol results in estra-2,5(10)-dien-17-one, M.P. l33-134. It has a maximum in the infrared at 5.75 microns.

EXAMPLE 4 Ema-2,5 (10) -dien-17-ol To a stirred solution of 1 part of lithium wire and 25 par-ts of ethanol in 500 parts of liquid ammonia is added dropwise over a period of 5 minutes, a solution of 1.4 parts of estra-2,5(10)-dien-l7-one in 25 parts of ethanol. An additional 2 parts of lithium wire is then added portionwise over a period of 1 hour. The ammonia is evaporated and the residue treated with ether and water. The ether solution is washed with water, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. Recrystallization of the residue from an acetone-petroleum ether solution affords estra-2,5(10)- dien-17 3-ol, M.P. 139-141"; [a] =+131. It possesses a maximum in the infrared at 3.02 microns.

The mother liquors from the above recrystallization are chromatographed on silica gel. Elution with 2% ethyl acetate in benzene attords estra-2,5(10)-dien-17a- "2, 44 7. I. a, I m I a .44; 01 which has a maximum in the infrared region at 3.02. proceeding according to the herein described processes, microns. I r -l7a-caproyloxyestra-2,5(10)-diene is obtained. EXAMPLE 5 I What is claimed is; I

vflwmpionoxystmaj(lmfdieneI 7 I H r I 1. Acompound of the structuralform l "-A mixture of 6.6 parts of estra-2,'5(l0)-dien-l7fl-ol, 150 parts of pyridine and 70 parts of propionic anhydride is heated on a steambath for 20 minutes, cooled," and diluted with water. The resultant precipitate is collected by filtration, washed with water and dried. The crude 10 product is recrystallized from ethanol to afford 17B- propionoxyestra-2,5(l0)-diene, M.P. .88-90. .It possssesa maximum in the infrared at 5.7' 7 microris.- Y I I I g I I r I I I By Substituting st d4 and other wherein Z is selected from the group consisting ofcarwise proceeding according to the herein described procbonyl', hydroxymethylene, and (lower alkanoyDoxyesses, 17.-propionoxye'stra-2,5(10)-diene is "obtained. methylene radicals. V

XHIP 1 .7 2. Esh'a-2,5(10) -dien-17+one.

I E I I 6 I3. Estra-2,5(1 0)-diene-17-ol. I I I fir l y r' t i 4.-l7-Propionoxyestra-2;5(10)-diene.'- A-mixture of 3 parts of Iestra-2,5(10)5dien:17fi o1, 75' 20 -I t fl n r V parts of, pyridine, and ,70 parts of caproic anhydride is fl-(pt0ly1su1fonloxy)estr-5 (1Q) '-en-17 -oneheated on a steambath forminutes. I The reaction I I mixture is coolediand poured into lSOO-parts of water.- References c m t r I r The crude product-is'collectedby fitration, washed.with I r UNITED STATES PATENTS r 2 water, driedfind recrystallized'fwmiethenql. n fi 25 2,729,654 1 Colton-- Jan. 3, 1 956 7 l P 'Y Y olene It Possesscw maxi- 2,806,030 Ringoldet a1. Sept. 10, 1957 1 main the infi'ared at about 5.77 microns; 2,846,452 Campbell: et ah v 1 Y substituting t elfl h en-fiw and otherwise 2,878,267 sz iitoge emit, Mar. 17; 1959 A 2,881,188 Babcocket l. ;2; A r.7,1959

UNITED STATES PATENT OFFICE CERTIFEATE :l Q0 ECTMN Patent Nos 2 944 O67 July 5 1960 William Fo Johns It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column l line 52 before 'propionic insert us For example estra -2 5(lO)=dien l7 ol is treated with column 2 line 35 for magesium read magnesium Signed and sealed this 3rd day of January 1961,

(SEAL) Attest:

KARL H. AXLINE ROBERT C. WATSUN Attesting Ofiicer Commissioner of Patents 

1. A COMPOUND OF THE STRUCTURAL FORMULA 